The losses to the world during this complete triumph of theology were even more serious than at first appears: one must especially be mentioned. There was then in Europe one of the greatest thinkers ever given to mankind--Rene Descartes. Mistaken though many of his reasonings were, they bore a rich fruitage of truth. He had already done a vast work. His theory of vortices--assuming a uniform material regulated by physical laws--as the beginning of the visible universe, though it was but a provisional hypothesis, had ended the whole old theory of the heavens with the vaulted firmament and the direction of the planetary movements by angels, which even Kepler had allowed. The scientific warriors had stirred new life in him, and he was working over and summing up in his mighty mind all the researches of his time. The result would have made an epoch in history. His aim was to combine all knowledge and thought into a Treatise on the World, and in view of this he gave eleven years to the study of anatomy alone. But the fate of Galileo robbed him of all hope, of all courage; the battle seemed lost; he gave up his great plan forever.(72) (72) For Descartes's discouragement, see Humboldt, Cosmos, London, 1851, vol iii, p. 21; also Lange, Geschichte des Materialismus, English translation, vol. i, pp. 248, 249, where the letters of Descartes are given, showing his despair, and the relinquishment of his best thoughts and works in order to preserve peace with the Church; also Saisset, Descartes et ses Precurseurs, pp. 100 et seq.; also Jolly, Histoire du Mouvement intellectuel au XVI Siecle, vol. i, p. 390. But ere long it was seen that this triumph of the Church was in reality a prodigious defeat. From all sides came proofs that Copernicus and Galileo were right; and although Pope Urban and the inquisition held Galileo in strict seclusion, forbidding him even to SPEAK regarding the double motion of the earth; and although this condemnation of "all books which affirm the motion of the earth" was kept on the Index; and although the papal bull still bound the Index and the condemnations in it on the consciences of the faithful; and although colleges and universities under Church control were compelled to teach the old doctrine--it was seen by clear-sighted men everywhere that this victory of the Church was a disaster to the victors. New champions pressed on. Campanella, full of vagaries as he was, wrote his Apology for Galileo, though for that and other heresies, religious, and political, he seven times underwent torture.